Dry-milk pulverizer



Filed, June 12, 1928 2 Sheets-Sheet [n'uenmr n amseverson/ Attorngy May 21, 1929. M. G. SEVERSON 1, 13,719

DRY MILK PULVERIZER Filed June 12, 1928 2 Sheets-Sheet 2 Inventor Mall/7'22 6f Seversom Q By Attorney Patented May 21, 1929.

unirensrres MELVIN G. SEVERSON, F BARBGN, WISCONSIN.

DRY-MILK P'ULVERIZER.

Application filed June 12, 1928. Serial No. 284,730.

The present invention relates to improvements 1n pulverlzcrs, and has reference more particularly to a simple yet GlilClQIlll devicefor association with amilk drier for the. purpose of pulverizing dried milk.

One of the important objects of the'present invention is to provide a pulverizer of the above mentioned character which includes a material receiving chamber having an inlet at one end and an outlet at its opposite end, a feed screw'being arranged withinthe feed chamber-for delivering the material to cutters arranged in the chamber adjacent the outlet end thereof, a sliding spring pressed closure being associated with the outlet for normally closing the same, but being adaptcd to be opened under the action of the pressure of the material in the chamber whereby the pulverized material will be discharged through the outlet.

A further object of the invention is to pro vide a pulverizer of the above mentioned character wherein the sliding spring pressed closure is also capable of rotation at a lower rate of speed than the rotation of the feed screw, a series of stirring pins being arranged on the inner face of the closure for agitating the pulverized material.

till a further object is to provide a dry milk p ulverizer of the above mentioned character which is simple in construction, inexpensive, strong and durableand further well adapted to the purpose for which it is designed.

Other objects and advantages of the invention will become apparent from the following description when taken in connection with the accompanying drawings.

In the accompanying drawings wherein like reference characters indicate correspond ing parts throughout the same:

Figure 1 is a longitudinal sectional VleW through the pulverizer embodying my inven tion, parts being shown in elevation.

Figure 2 is a vertical sectional view taken approximately on the line 2 2 of Flgure 1.

Figure 3 is a similar section taken on the line 33 of Figure 1 looking to the right.

Figure t is a vertical sectional view taken on the line l-4e of Figure 1.

Figure 5 is a side elevation of the closure member forming a salient part of the present invention, and V Figure 6 is a detail view of the cutter that is carried by the feed screw shaft.

In the drawings wherein for the purpose of illustration s shown the preferred embodiment of my invention, the numeral 1 designates a cylindrical horizontally disposed feed chamber that is open at its respective ends, a substantially rectangular shaped housing 2 is formed on the top of this cylindrical chamber at the intermediate portion The forward end of the cylindrical chamber provides an outlet opening or neck 6, and a flanged collar 7 is arranged around the outer end of this neck. A substantially circular casing 8 which is open at its inner side and also at its bottom is secured to the outer face of the flanged collar and provides what may be termed a discharge spout. lhe discharge opening of the spout is indicated at 9 in Figure 1.

A pair of vertically disposed spaced standards 10 and 11 respectively are arranged at the opposite ends of the cylindrical chamber, and the upper and lower ends of these standards are formed with bearings designated L generally by the numeral .12. It will be ob served that the bearing associated with the upper end of the standard 11 is considerably larger than the bearing associated with the upper end of the standard 10 and the purpose thereof will be presently described.

Journaled for rotation within the bearing 13 formed on the upper end of the standard 11 is the intermediate portion of the elongated tubular member let, the same be ing formed at its inner or rear end with the circular disc 15 that provides a closure for the forward end of the outlet neck 6, and this closure head is operable within the casing 8. A series of stirring pins 16 projecting from the inner face of the disc 15 for disposition within the outlet neck 6 as shown in the drawings, and these pins are preferably arranged adjacent the perimeter of the disc as shown in Figure 3. The tubular member 14 is adapted for slidable as well as rotatable movement,

as will be described in detail later in the specification. V p An elongated shaft 17 is disposed longitudisecured on the shaft .17 at the forward end of the feed screwfor rotation with the feed screw, and this cutter is operable within the rear end portion of the outlet neck 6, as indicated in Figurel. In Figure 6 ofthe drawings there is shown more clearly the manner in which the feed cutter is associated with the shaft.

@A pair of diametrically opposed stationary cutter members designated bytnenumeral 22 extend radially into the outlet neck 6', and these stationary cutters are located between the movable cutter 20, andthe. outer ends of the stirring pins 16, as shown very clearly in Figure 1. Each stationarycutter is formedwith a bolt that extends through registering openings formed in the outlet neck and sleeve portion of the flanged collar 7', and a nut 23 is secured on the threaded bolt.

A counter shaft 24 is journaled for rotation through the bearings at the lowerends of the spaced standards 10 and inane this counter shaft is driven by the feed screw carrying shaft 17 through the medium of a sprocket chain 25 that is trained over suitable sprocket wheels carried by the rear end portions of the respective shafts. V V V A sleeve 26'is arrangedon the forward end of the tubular member 14, and carried by the inner end of this sleeve isfthe sprocket wheel 27 that is dlsposed in alinement with a smaller sprocket wheel secured on the forward end of the counter shaft 24 and a sprocket chain 28 is trained over those alined sprocket wheels;

whereby the sleeve 26 will be rotated by the counter shaft simultaneously with the rota tion of the feed screw and its supporting shaft;

The sleeve 26 is formed with the longitudinally extending slots 29 in its opposed sides and slidable in these slots are the apertured blocks 30 through which extends the respective endsof the bolt 31. This bolt extends through registering openings formed in the tubular member 14. A nut 32 is threaded on the threaded end of the bolt and when the parts are thus assembled, the sleeve and tubular member will be secured together for ro- Ypresently described. nally through'the cylindrical chamber 1, the

"trated in Figure 1.

' 1 pair of arms 33extend laterally from the lower portion of. the standard 11, and secured on the outer ends of these 211111315 the angular bracket 34. A vertically disposed lever 35 is pivoted at its lower end on the outer end of the horizontal portion of the angular bracket 34 as shown at 36 in Figure 1, and carried by the upper end of this lever is a head 37 that engages with a flanged ring 38 that operates within a cup shaped member 39 secured in the forward end ofthe tubular member 14, and ball bearings 40 are interposed between the 'ring88 and the cup shaped member .39 as shown in Figure 1.

A bolt 41 is pivoted at its inner end on the upper end of the vertical portion of the angular bracket 34 and extends through a slot formed in the intermediate portion of the lever 35. arranged on the outer end of the boltv 41, a nut 43 being threaded on the outer end of the bolt. An expansible coil spring44 is arranged around the outer end portion of the bolt for disposition between the discs 42 and the purcup shaped member 39, thereby exerting an.

inwardpressure on the tubular member 14 to maintainthe closure head15 in engagement w1ththe outer end of theioutlet neck 7 6, as shown very clearly in the full lines in Figure 1.

A set screw 45 is threaded transversely throughthe vertical portion of the angular bracket 85 to adjust the tension of the coil spring 44', and this feature is clearly illus- The operation of my improved pulverizer may be briefly stated as follows. p

The material to bepulverizedis delivered to the chamber 1 through the feed pipe 5, and when power is applied to the pulley 18,

the shaft '17 and the feed screw mounted thereon will rotate whereby to effect the feeding of the material from the rear end of the A pair of flanged discs 42 are 7 no I chamber to the forward or outlet neck 6, and

as the 'll'littelltll passes into the outlet neck, the cooperating rotatable and stationary -cu tters will break up the material, and also the rotation of the tubular member 14 and the head 15 will result in the pins 16 agitating or stirring the material inthe outlet neck.

The closure head 15 is adapted to rotate at a slower rate ofspeed than the feed screw.

The pulverized material is discharged from the pulverizer through the discharge opening 9 by the pressure of the material against the closure 15 wherebysaid tubular member 14 will be moved outwardly through the bear- 1115514 and the sleeve 26 against the tension of the coil spring 44 so that the closure will assume the position shown in the dotted lines in Figure 1 whereupon the pulverized material can be forced from the outlet neck into the discharge spout and finally discharged through the outlet 9. The spring 44 will tend to return the tubular member and the closure head 15 to its normal position so that the dis charge end of the outlet neck will be closed.

It will thus be seen from the foregoing description, that I have provided a pulverizer that will'at all times be positive and efficient in its operation and furthermore the closure for the outlet neck will be operated automatically, depending upon the pressure of the material in the chamber.

A pulverizer of this character is particularly adapted for association with a milk drier for pulverizing dry milk.

The simplicity of my improved pulverizer enables the same to be constructed at a very low cost and furthermore the parts are so arranged that access to the same can be readily had whenever necessary.

Nhile I have shown the preferred embodiment of the my invention it is to be understood that minor changes may be made therein without departing from the spirit of the invention and the scope of the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is 1. In a pulverizer, a horizontal chamber provided with a. material receiving inlet at one end, an outlet neck at the other end of the chamber, a pair of standards formed with bearings at their upper and lower ends, a tubular member slidably and rotatably disposed through the upper bearing of the standard adjacent the outlet neck, a discharge spout at the outer end of the outlet neck, said tubular member extending into the discharge spout, a closure head formed on the inner end of the tubular member for engagement with the outer end of the outlet neck to normally close the same, a shaft journaled for rotation through the upper bearings of the standards, a feed screw carried by the shaft for disposition within the material receiving chamber, a drive pulley arranged on the shaft for rotating the same, a counter shaft journaled for rotation through the lower bearings of the standards, means for operatively connecting the shafts at one end for simultaneous operation, additional means for connecting the counter shaft with the tubular member to rotatethe same, cutters arranged in the outlet neck, stirring pins carried by the closure head for disposition in the outlet neck, and means for normally holding the closure headin the closed position, said closure head being moved to an open position by the pressure of the material in the feed chamber.

2. In a pulverizer, a horizontal chamber provided with a material receiving inlet at one end, an outlet neck at the other end of the chamber, a pair of standards formed with bearings at their upper and lower ends, a tubular member slidably and rotatably disposed through the upper bearing of of the standard adjacent the outlet neck, a discharge spout at the outer end of the outlet neck, said tubular member extending into the discharge spout, a closure head formed on the inner end of the tubular member for engagement with the outer end of the outlet neck to normally close the same, a shaft journaled for rotation through the upper bearings of the standards, a feed screw carried by the shaft for disposition within the material receiving chamber, a drive pulley arranged on the shaftfor rotating the same, a counter shaft journaled for rotation through the lower bearings of the standards, means for operatively connecting the shafts at one end for simultaneous operation, additional means for connecting the counter shaft with the tubular member to rotate the same, cutters arranged in the outlet neck, stirring pins carried by the closure head for disposition in the outlet neck, means for normally holding the closure head in the closed position, said closure head being moved to an open position by the pressure of the material in the feed chamber, certain of said cutters being arranged in a stationary position in the outlet neck, one of the cutters being carried by the feed screw supporting shaft for rotation therewith.

In testimonywhereof I affix my signature.

MELVIN G. SEVERSON. 

